Mining-machine.



(1.1. E. WAXBOIVI. MINING MAcHlNE. vAPPLICATION FILED SEPT. i8, 1913.

lPatent-ed Jan. 16, 191.v

5' SHEETS-SHEET l.

Tllllllllllll lll (3.1. E. WAXBOM.

MINING MACHINE.

APPLICATION FILED sr-:PT.18. 191s.

1721.129??? l Patented Ja1'1.16, 1917."

5 SHEETS-SHEET 2. 67'

0.1. E. WAXBOM.

MINING MACHINE. APPLICATION FILED SEPT. I8. |913.

Patented @16,1911

5 SHEETS-SHEET 3.

.90 ana/ 0.1. E.. wAx'oM.

MINING NIAIIHINE. APPLICATION FILED SEPT`.I8.I9I3.

Patented Jan. 16, 1917.

5 SHEETS-SHEET 4.

lC. J. E, WAXBOIVI.

IVIININ G 1111101111115*I APPUcATloN FIL'ED sE`PT.18,1913.

111118111611 Jan. 16,1917.

5 SHEETS-SHEET 5.-

En s'rA'rEs CARI. J. E. WAXBOM, or COLUMBUS, OHIO, AssIGN'oR To THE JEFFREY MANUFACTURING COMPANY,- OE COLUMBUS, OHIO, A CORPORATION OE OHIO.

MINING-MACHINE.

This invention relates more especially to Aside cutting mming machines which are adapted foruse in room and pillar niining.v Machines of' this character, as nowv commonly constructed and used, l comprise a bed frame, an. endless chain cutter 'frame from theinner end of the bed. frame, a power-actuated flexible draft ,de- 'vice-cable, chain or the like-arranged to eXert a forward vdraft on the inner end 4of the bed frame to propel the machine along the face 'of the coal, and a further flexible counteract the reactionA of the coal o`n the draft device arranged to exert a retarding draft on the Outer end of the bed frame to.

cutter frame which, when the machine is fed forward along thevface ofthe coal, tends to v,cause the outer endof the machine to swing which is'paid out as the machine advances or slew around Vin advance of the .other parts. By providing a su-itable retarding draft on the outer end of the machine lthe latter can be guided andV controlled Ain its movements asdesired. f

. One of the objects of my invention is the provision of' a machine of lthe' character referred to having al power actuated propel'- ling cable `or the likeand a reta'rding cable l vat a rate independent of the vpower driven propellingdevices, but, at the same time, isv

capable of having powerf applied to it for lthe purpose of positively swinging the outer end of the machine rearward so as to vary mentioned,

its-working angle to the coal face. l t Another object of the invention -is the provision Of a retarding cable, such as last in combination. with suitable guide devices on the bed frame over which i r the retarding cable can' be passedand car-fI ried to a distant anchor or the like so that 5o 1to move the machine tow when power is applied to the cable, it serves ard the Xed anchor or abutment. 4

The above,- and other more or* less inciden.- tal or ancillary objects'of my inventionLa'nd I 5@ the manneroffattaining them, will be clearly Specification of Letters Patent.

Patented Jan. 16, `im W.'

Aiipiieation inea september is, 1913, serial No. 790,442.

understood from' vthe following description Fig. 1, the cutter chain being omitted.' "Fig 4L is a vertical transverse section On the line '1l-#1 of Fig.` A1. Fig. 5 is a detail vertical Sectional view of the-clutch which vconnects the driving gearing to the 4'rear sprocket wheel of the cutting chain, and of 'the devices for actuating said'clutch. Fig.'- 5ais vice. Fig. 6 is a plan view on. a larger scale of the innerpart ofthe bed frame and of the 'gearing with gear casing removed.l Fig. 7 is avertical longitudinal section on the-line 7 7 -of Fig. 6L ,Fig S'is a verticalsection on the line 8 8 of Fig. 6. Fig. 9 is a vertical transverse section on the line 9-9 ofi Fig. 6.' Fig. 10 is an enlarged elevation of the .outer part ofthe rear side of the machine,- the" retarding drum being shown in section. Fig. 11'is anenlarged elevation of the outer endof the machine. Fig. 12 is an enlarged plan view of the outerpart of the` machine. Fig.A 13 is a diagrammatic view showing the machine at the beginning. ofthe entering or sumping cut. Fig-14 is a similar view showing the machine when the sumping` cut is partly completed. Fig..15 is a similar view' showing the machinef at the end of the 'sumping cut and ready tostart .the sidecut alongthe face ofthe. coal. 4Fig.

16 is a similar view showing thevmachine during the operation ofundercutting along .theface of the coal, the manner inwhich4 the retarding cable'can bepassed 'over the guide sheaves `in, various waysA for'moving 4the machine over the floor of the mine be.-

ing indicatedby the dotted and broken lines.

Fig 17 is' a vperspective view of the flanged' plate which is used. to assist inV guiding the machine during the sumping cut and to serve as a shoe during the makingof the 'side cut.

The machine comprises a'bed frame, a. cutter frame projecting from the inner end thereof, propelling `and guiding devices 7o i a face view ofthe said clutch` actuating demounted on the bed frame, a motormounted ,on the bed frame, arid suitable driving con; nectio'ns 'between the, motor and' the pro- 1 tom plates 7, and intermediate spacing bars 8 which are` securedy togetherl as by rivets 9 pelling devices, the guiding devices, and the cutters, respectively. y

. Referring 'to the construction in detail, the bed frame is composed .of a bottom plate -1, flanged side plates 2, 2*, and a top plate '3, u all' of which are connected to form a rig1d' structure. T-he top plate 3 is preferably in the form of a castingand is form-ed with front and rear depending brackets14-and 5, respectively, upon which the ,cutter frame is mounted. The two parallel sides of the cutter frame are made up of top plates 6, b'ot- (see Fig. .3). The space between the outer edges ofA plates 6.and 7 forms a guide for a cutter chain 10 which may be of any suitable construction. ,Ways are also formed between the inner edges of the plates 6 and 7, and these Yways are adapted to receive anged projections on the brackets 4 and 'y p 5 of the bedframe. The sides of the cutter 13 over which .the cutter chain passes.

frame are connected at their front ends by lsuitable upper and lower plates 11 and 12 -between which is mounted a sprocket wheel the outer 'end -of the cutter. frame the cutter chain passes over a sprocket wheel 14 which is loosely mounted on an upright shaft 15 carried by the bottom plate 1 of the bed frame. The shaft 15 is preferably connected l `to the bottom, plate by means of a base cast ing 16.1riveted to `the-.bottom plate, the 'shaft being secured to .this base casting by a key 1.7..

' The machlne is designed to be propelled along the face 4of the coal during the cutting .operation by a cable o r the,like, and upon the inner end of the bed frame is mounted a winding drum 18. A suitable draft cable 19 has one end secured to the winding drum i so that it can be wound upon the drum when the latter is turned. The cable 19 passes downward from the drum and under a guide sheaveor pulley 19a which is mounted in a block 19h. This pull ey`block is in the lnature of a caster frame having a hollow'cylindrical vstem or spindle rotatably -mounted 'in the vtop plate of `the Vbed frame. .The arrangement is such that-the cable 19 passes downward through said hollowspindle, and thence' under the pulley. With the pulley mounted rinthis manner, it will be seen that the cable ,f 19 can be taken off in any desired direction within a range of about 1800. The drum 18 is mounted upon a longitudinally disposed shaft 20 carried in bearings 21. and 22. The

winding drum 18v is mounted to turn freely on the shaft 2O but is normally turned with the shaftby means of the following connections. y f

23 is a 'spur gear which is'keyed on the shaft 20 on the outer side of th-e winding drum, and the -latter is clutched to the gear 23 by aplurality of clutch pins 24 which are slidably mounted inthe drum`l and are adapted to have their ends projected into end of the bed frame with its armature shaft arranged longitudinally of the machine.` This motor is designed'to drive the winding l drum 18 and the cutter chain 10, and to this', Yend the following gearing isv provided. The i armature shaft 28 ofthe motor carries at its inner end a bevel pinion .29 which meshes with abevel gear 30 on the vertical shaft 31. The lower" end of thisishaft is mounted in a bearing 32 formed inthe -depending bracket 5 of the'bed frame (see Fig. 4). The upper end of the shaft turns in`a bearing 33 carried by an upstandingframe or yoke 34 mounted on the bed`frame.

35 is a worm which, like the beveled gear 30, is keyed to the shaft 31. This worm meshes with a worm wheel 36, which is mounted upon a longitudinally disposed shaft 37. This shaft is mounted in bearings 38, 39 .carried by the top plate of the bed frame; A ball thrust bearing 40 is preferably interposed betweenthe upper side of the bevel gear 30 and the bearing 33 to take the axial thrust of the worm.

rThe pinion 41 is mounted to vturn loosely on shaft adjacent the. bearing-3.9, and

upon the front end of the shaft-37 is-mounted a spur `pinion 42. The latter pinion has a sleeve-like hub extension 42awhich extends through thevbearing 38 and has a large spurv gear `43 keyed to its rear end. rThe outer Vend'of the hub of gear 43 is formed with a toothed. clutch extension 44'and thepinion- -41 also carries on its vinner end a, toothed `clutch element 45. A grooveol clutch collarr 46 is slidablyl keyed upon the shaft 37, and

by means of it either the pinion 41 or the .gear 43 andppinion 42 can, at will, be

clutched to the shaft The clutch rcollar 46 is shifted by means of a lever arm 47 "which is 'secured to the lower end of a vertical shaft-48, said shaft carrying at itsupperend a transversely disposed hand lever or bar 49. The lever 49 preferably extends to both sides of the machine so that it can readlly; begrasped by the operator when standing at either side of the machine. The u pinion 41 meshes with a gear wheel 50 which is mounted upon the outer end of a short shaft 51, this shaft being carried by a bear.- ing on the bed frame.

v 53 is a pinion secured to the inner end of the shaft 51 and meshes with a gear wheel 43. The pinion 42 meshes with a large gear 23 which, as previouslystated, is keyed to the shaft 20.

55 is a ball thrust bearing which is interposed between the pinion 41 and the beai-,

ing 39 to take any axial thrust that may result from the vaction of the worm and ,worm wheel.

It will be seen that by means of the gearing described,`the winding drum 18 can be driven at either onftwo speeds from the shaftI 31, which 'itselfis directly driven by the motor. Thus, if the clutch 46 is thrown sok as to make the pinion 41 fast on the shaft 37, the rotation' of said shaft will be transmitted through pinion 41 and gear 50 to the'shaft 5 1, thence through pinion 53,gear 43, pinionv 42 and gear 54 to the winding drumv18.V On the -other 'hand, if clutch 46 is thrown so as to connect gear 43 andwith it pinion 42 to the shaft 37, the rotation of` said shaft is then' transmitted directly. to

the bed frame structure.

stud 66 which projects from the front face pinion 42- and gear 23 tothe winding drum 18, thus rotating-the latter Vatccnsiderably Lif-fher' speed than before. With the clutch thrown as last described, it -will be noted.

that pinion 53, gear 50' andnpinion 41 turn idly. The

driving the cutter jchain, shaft 31, and near its lower end is mounted a 'spur pinion 56 whichmeshes with a large spur gear 57 which is mounted to turn freely upon the upright shaft 15, said gear being disposed directly above the cutter chain sprocket wheel14. On the upward following devices are provided for extending'hub 57a of the gearis slidably, mounted `a collar 58 which'carries. a plu' `rality o f depending clutch pins 59 which extendthrou'gh apertures in the web of the spur gear wheel'57. The upper face of the` sprocket wheel`14 is provided with a series ofhollow semi-cylindrical bosses 14a, there being one to correspond with e'ach ofthe clutch pins 59, and 'when the collar 58 and said pins are in their lowermost position, the j pins engage the -bosses 14a so that the ,rotasprocket wheel 14f The collar 5,8 is grooved to receive .a-band 60 to which is connected a lever arm 61 having its forward end'pivotally connected at 62 to .the rigid part of A link 63 iscon-4 nected Vat its lower. end to the lever arm 61, and at its upper end is connected to an eccentric band 64 which fits upon an eccentric 65. Said eccentric is mounted upon ,a screw of the frameofmotor 27,A and the eccentric is provided with apivoted handle 67, by'- 27 is driven so as tomove the cutter chain means of which it can-be turned to actuate the link 63 and raise and lower the clutch 0n the vertical tion of gear-'wheel 57 is transmitted to 67 is very conveniently located to be grasped bythe operatorwhen` he desiresto throw f the cutter chain into or out of operation.

If it is found desirable the frame metal of the motor 27, which overlies the shaft 15,

can be formed with a socket 27?* to receive the upper end of said lshafty and give it additional support 4(see Fig. 5).

I prefer to inclose the inner train of gear-v ing by a casing 6 8, for obvious reasons.. On

one side of this casing I mount a rheostat 69 for 4'the motor and an operating shaft 70`ex tends from the rheostat to the outer end of the bed frame where it is .providedl with a hand wheel 71 which can be conveniently grasped by thevoperator when at the outer end of 4the machine.

My improved devices for guiding thema--A chine' or holding `it` upto its work as it`v advances v'along the face -of the coal comend of the shaft'37 is keyed, or otherwise suitably secured, a pinion 72 which meshes with a gear'7 3 that is fast on the inner end of'a longitudinally extending shaft 7.4. This shaft is mounted in bearings 7 5 and 76, the

frame and the latter being preferably bolted to the side of the frame of the motor 27.

77 is a cable winding drum rotatably' mounted on'th'e 'outer end of the shaft 74,

former being bolted to the side of. the bed and interposed between the shaft andthe inner surface of the drum 77, similar friction-disks 81 which are' notched to engage lwith notches to engage a rib or lribs on the I arib or ribs on a cylindricalv extension 7 9a of the pressure plate and arranged alternat'ely with the friction disks 80, a' springY 82 interposed between the pressure plate 79 and the hub of the drum 77 tending to force l the former outward, and an adjusting hand ,f wheel 83 mountedon the threaded end 74l of the shaft 74 and aiilapted,l when turned,

lto press the plate 79 inward against the frica tion-disks and 81 which `in turn press againstthe body of the drum`77. By ad-fy Y Justing the hand/wheel 83 theA friction dey vices can ber controlled to vary thepforce `1 transmitted from shaft 74 to drum 77 from :zero up to a maximum corresponding to the full power with which 'the shaft is driven.

-84 is a retarding cable havingv'one-'end'se-V cured to the drum`7 7 while its other end is adapted to be secured tol any suitable fixed abutment, such as'an 'anchor or a screw jack.

It will -be observed that when themotor 74 is driven in aclockwise direction, as

85 prise theA following parts: On the -outer f viewedfrom its outer end, and consequently l any, rotational movement transmitted from thef shaft to the drum 77 tends to wind up 'the cable. 84, the .latter vleaving the drum `from its lower side. Hence, as the machine advances in the undercutting operation, the

.rotating shaft 74 tends constantly to wind up I, the cable 84, but slippage in the friction brake or clutch device 79 permits the drum 77 to turn in a direction oppositethat in which the shaft 74 rotates so thatv the retarding cable is paid out as the machine advances under a tension which canbe variedy and controlled at will by means of the hand wheel 83 ofthe friction mechanism. f If it is desirable at any .time'to swirl the outer end .of the machinel rearward, t is canbe accomplishedv -by tightening the friction mechanism until ythe rotation of `shaft 74 is transmitted to the drum 7 7'7` theV conse-quent Winding in of the retardingcable serving to pull the outer end of the machine positively as a clutch device when it is desired to transrearward.

In some casesit may be desirable that the friction mechanism 79.' be not used as a brakefdevice to control'vthe4 paying out of the retarding cable, but that it be Aused only mit the rotation of the shaft 74 to the wind'- `ferred to. In the construction shown I have.

ing drum for the purpose of swinging the outer .end of the machine rearward during the undercutting operation, and also under other conditions which will presently be re,l

therefore provided the drum 77 with a cylindrical flange or extension 7 7a and on this is arranged aflexible brake band 85. Clamp-- ing lugs 86 and 87 are riveted or otherwise nut, when the parts are in position as shown,

secured to the respective ends of` the brake band 85. These lugs are perforatedtolreceive va clamping bolt or screw 88 and the lug 87 is slotted to receive a nut 89. This engagesthe bottoni of the slot formed in the lug 87 -so that it cannot turn. By turning the bolt 88 one way orthe other the lbrake l l band may be tightened or loosened as de- 'sired. As a convenient means for turning thes'crew bolt 848, a handle 90 is pivotally secured to the end ofsaid bolt.

' v86a which is perforated so as to 4*pass over 'a cylindrical `boss .76*1l formed on an exten-4 l i. sion 76h of the bearing bracket 76, and the brake band is thus Iprevented from bei-ng bodily displaced.A V l It will vnow be seen that the flexible brake l band 'can be used tocontrol the paying out.

' of the retardingcable 84, and then,.if it is desired to swing the outer part of the machine rearward, this can be done by the power of theimotor by tightening up the friction devices 79 sofas to clutch the drum 77 to the shaft'74, the adjustment of the The lug 8,6 is formed with-a vertical extension or flange.

vby means of which it can be readily moved into and out of locking position. If this positive lock is thrown into operative position when the machine is advancing, it will be' seen that the outer end ofthe machine is locked-against further advance and becomes a lixed or pivotal pointlabout which the 'machine vwill swing as the propelling I cable' is wound in. In a word, the positive lock constitutes a further.' means by which' the angle ofthe machine to the face of the coal can be changed. y

By providing the retarding drum 7:7 with the above described power connections, I am enabled to use said drum when desired as a power drum for moving the machine over the retarding cable' 84 can be passed and thence led oil1 in various -directions so that.

the tension in the cable can 'be exerted upon the machine tomove it in various directions. One desirablearrangement of guide'sheaves is shown in thedrawings. At the `frontside ofthe drum. 77 .is a vvertically arranged sheave 94" which-is adapted to receive the cable 84 as it leaves the drum, and in con,-

` the floor of the mine, for loading it upon 'the Y truck', etc.` To fa'cilitate'such use of the re- "tarding'drum I provide guide sheaves suitably mounted on the bed frame over which nection with this sheave 94-I provide three' f sheaves 95, 96, 97, mounted on therear outer corner, the middle of the outer end, and the outer front corner, respebtively, of 'the bed frame. I alsoprovide on the rear side of the bed, frame a sheave 98. It will be seenl 'that the cable 84 can be ledv olii-'from the j drum -7 7 under` the sheave 94, then .around sheave 96 and thence to a. fixed abutment, or can be'led from the sheave 94 to and around the'sh'eave. 97 and thenceto the fixed abutment. Again, `the, cable can be passed 'from the-.drum over the sheave 94 and thence around sheave 95 and olf to a 4iixed abutment, or,from thegsheave 95 lcan be led to and'varound the sheave 98 and thence to the fixed abutment. AIt-will be understood, of

course, that the tension is thrown o thebrake band '85 when the drum 77 .is to be used as apower Adrum for moving the machine.' I

A. vVhen the machine is brought'into a mine Vroom to undercut the coal, the first operation cast sections 99a and 99b which are. secured isthe making ofthe entering or sumping cut.f D,uring' `this operation it-,isnecessary f vto guide the machine'as it is advancedlongi. i tudinally, and to this end,'1 providethe folllowing devices.

`99 is an arm preferably inthe form of two together-by bolts 100. lThe section 99a 'has' 'a depending'outwardly turned flange '101, and the section 99b has'a similar liangellOQ, these flanges being constructed to slidably fit the ways formed between the plates 6 and 7 of the vcutter frame.' The arm 99 is formed at its outer end with a hook or notch in which' is' mounted a pulley 103, which is arrangedl so that the feed cable 19 can be passed over l making th?J sumping cut.'

it when said cable is4v extended The operation of the -machine vwill'now be readily understood. The machine, fon' bejack 1,04 at'the face of the coal. A flanged guide plate `-105 is'thenvslipped under. the

against .the forwar machine with its vu standing, flange. 'placed side-ofthe bed framel near fthe.' inner end thereof, andisy secured in position by 'aj ack l106. The motor having been' started, the collarjclutch 58 'is thrown in, and clutch 46 is throwninto engagement with the pinion 4,1,thus driving I as .the cutters' removel the coal.

`thecuttersfa1d turningthe winding drumA 18 at slow speed. The tension on the cable 19 'draws the' machi'ne forward against the coal, forcing the cutter frame under'the face d The 'com- 'bined action ofthe cable tension' and reaction onthe cutters as the `entering 'cut b egins, is to throw the inner end of the cutter y frame: to the right and the outer end of the machine to the left. This action is counteracted by the engagement of the guide arm 99 with thetaut cable and by the guide arm engages the'face of the coal, as shown plate.105, the former preventing the Inove-l ment of the cutter frame to thel right, while -the guide plate prevents' the outer end of the machine from swinging to the left.

ADuring 'the first part of the sumping cut', the guide arm 99 moves inward `with the'cut# ter fame along the cable 19-until the said fin Fig. 14.- Thereafter the cutter frame l slides inward in relation tothe guide arm 'until the sumping cut' is inished, with thel 6'0 machine, in the position shownin Fig. 1'5, where, itwill be noted,.the inner end lof the bed frame is forced up-to the guide, arm. When the machine has thus been advanced fully under the coal, the guide` plate 105 inward in 'I removed, and thecable 19 is stretchedalong the face to' theleftrib where it'isrnade fast 'to an 'anchor or jack 107 The rear guide "cable .8 is'then made fast-toan anchor orl jack 108 adjacent the rightrib, and the l'machineisagain started.. -At thebeginning of the side' cut the retardingQdrum 77 is ing done either Abylmeans of theV positivelI nlock 91' or by tightening up., the brake band- 85." By thus locking the retard'lng drum,

^preferably locked against rotation, this vher` 'the outer end ofthe machine is made prac- 'd vticallya pivot point, while the cutter bar` is. l'swung'forward by the wlnding up. ofthe propelling cable 19. v Assoon as the machine f is swung around to the proper angle forside cutting, the control devices of the drum are, arrangedy or adjusted so' as to allow 1t `to pay out the `retarding cable 811l underfa 'suitable tension to maintain the'machmefat the proper an le 4tov the undercutting proceeds; i

Such' control of the retarding drum can readily be effectedfby means ofthe friction brake 1.78-, jBy suitably setting this brake,

he face 'of the coal as rotation of the drum 77, in a direction to 'payout the'c'able 84, can .be opposed by any desired 'amount fof frictional resistance.

the outer end of the-machine tends to ad-v vance toof'rapidly in relation tothe inner parts .of the machine, itis only necessaryto Atighten the brake'by means .of the hari'd wheel' 8 3', and on; the' other'endV theA brake. can readily be loosened. ifiheouter end, nt

the machine i's' retarded too' much.- 'At times in undercutting. it becomes de,

siiable tofswing the outer end'of the machine-- rearward 'quickly' without waiting for a gradual change'inthe angle of the machine a'sit advances along .the face. With myimproved' construction the quick swinging;

dof the outer end. of the machine cani be ef-v 'fected with great'ease by simply tightening -up the -brakedevice 78 until it acts .as a:

clutch causing the drum 7 7j to turn'with the constantly rotating shaft 74.. This causes a' winding up of `theretarding cable 84 and the consequent .rearward swinging of the outer end of the machine. The drum 77 can be clutched in this mannerV to the shaftl 74 while the inner winding drum is in operation and the machine advancing, or, if it be desired,l the propelling devices can be stopped by throwing the clutch 46 to inop erative position before the clutch 78 is tightened up to swing the outer end of the machine rearward. 1

Under some conditions it -becomes desir-M- able, while undercutting, to move the mav chine bodily "rearward, andthis can readily be effected yby means of my improved retarding drum. For'example; if the cutters l encounter a. l`roll, sulfur ball or other impenetrable obstruction, it is` sometimes possible, by backing the machine offytostart l an upwardly inclined cut .that will carry lthe machine over theobstruction and thence down again to the norinallevel of the keif.

Vith my improvedv machinetliatfcan readily tbe accomplished by passing- ,the retarding cable'84 around guide shea-ves 9i, 95v and 98 and thence rearward to suitablefxed abutment, whereupon power having been thrown off the propelling drum 18, the clutch 7S can be tightened so as to wind up the cable 8st and draw the machine rearward the desired distance.

While the brake or clutch device 7S can .be used inthe manner described to control the paying out and retarding cable, -it vis also possible, Vas have previously mentioned, to effect the control of the paying out of the cable by means ofthe band'brake `may. be passed under the guide sheave94, -then around the sheave 96 and thence to the -jack orA otherfixedabutment toward which the machine is to be drawn.` Then by tightening theclutch 78, powei` is applied and the movement of the machine readily effected. During such handling of the machine the powencan of course be thrown off the winding drum 18 and also the cutters can v.be .disconnected from the motor by simply throwing the clutch handle G7.A Usually it is desirable to `leepthe cut-' t'er chain running until the cutters' have been drawn out ofthe kerf. `When the machineI has been drawn over to the "truck, it

can be loaded on the truck with great ease byv means of the power. driven drum 77. The cable 84 having been attached .in the usual manner to the frame of the truck, the operator'is enabled to apply the power to draw the machine endwise onto the truck by` simply manipulating the hand -wheel` 83. The machine can be loaded in this manner with very great ease and convenience because the machine runner'is enabled to stand- `at ,the outer end of the machine` in a posi- 1 fion where he can see whether the machineI moving properly onto the truck, andfoi" f the/f irther reason that the runner can `con-I trol t espeed of the windingdrum with considerable nicety simply adjusting the hand wheel 83.

ln the handling of the machine it mayof p course be desire le in some cases to use for ignari? nl this purpose the drum-1S and tlie cable 19,

asA when it is desired to unload the machine from'tlie truck, and in other cases in which convenience `might dictate the use of tlie inner drum and cable rather than the outer drum Wand cable 84. 'lnthis connection it will- -be 'observed "'that, the various guide sheaves mounted on the bed frame are adapted for use in connectionwith the cable 19.

That l claim is :d

l. ln a mining machine, the combination of a bed frame, power drivencutting apparatus projecting from the inner-end of the bed frame, a power actuated cable arranged to exert a forward draft on the inner part of the bed frame to propel the machine along the face'of the coal, a winding drum on the bed frame, a retarding cable having one of its end s attached tothe winding drum and being adapted and arranged to extend rearward from the machine to an anchor. and exert a retarding draft on the outer part of the bed frame, and power actuated driving devices for the said drum rotating in a direction to wind up the retarding cable, said driving-devices y comprising an adjustable friction transmis- -sion clutch adaptedeither to transmit thev rotation' of the 'driving devices so as to .cause rotation of the drum in' the direction to wind up the retarding cable or to permit rotation of said drum in the opposite direction with various degrees of frictional resistance asv the machine is advanced along the face of the coal inthe cutting operation.

2. In a mining machine,the combination 'of a bed frame, cutting apparatus projecting fromthe vinner -end of the bed frame, a winding drum mounted on the bed frame; ay feed cable havingcne end secured to said winding drum andadapted to exert av forward` draft on the inner part of the bed iframe to propel themachine along the face .ofthe coal, a second winding drum mounted onthe bed frame, a retardingcable havingv one of its ends attached, to the *last named winding drum and beingadapted and arram adito extend rearward from the `machineto an anchor orthe like and exert a retarding draft on the outer-'part of the bed frame; a motor on the bed frame, driving connections between the motor and 'the cable, said devices comprising an ladjustable frictiontransmission clutch adapted either to transmit the rotation of the driving devices so as to cause rotation of vthe drum in the direction to w-ind up'the retarding cable or to permit rotation of the drum in the opposite direction with various degrees of fricl along tional resistance as the` machineisadvanced the face of thev coal in the cuttingfop- 'j eration.

3. In a mining machine, the combination of a bedframe, cutting apparatus project- ,ing 'from the inner end of the 'bed frame,l a' cable arranged to exert a forward Tdraft -onv 'the inner part of the bed frame to propel '-the machinealong the face of the coal, a

l@ winding drum tolwhichoner end of the said` .cable is connected, a'retardingcable ar-fIk ranged to exert a rearward draft on the outer partof' the bed frame, a Winding drum on the bedframe to which one end ofv 1.5 the retarding cable is connected, a motor on 55 sistance l the bed frame, driving lconnections between the motor and the cutting vapparatusydriv- -ing connections,comprisingA a disengageable f clutch between the fmotor andy the first named winding drum, and driving connections between the motor' and -the retarding 'cable drum rotating in a direction `to wind up the-retarding cable, said devices compris- `ing an adjustable 'friction transmission of a'bed frame, cutting` apparatus projecttin'g from the inner end of the bed frame, a 'power actuated cable arranged to exert a forward draft on the inner part of the bed frame to propel the machine along .the facek of the coal, a winding'drum on the bed 40. frame, a ,retardingcable hav-'ng one of its ends attached to the winding drum and being adapted and arranged to` extend rearward from the machine tovan anchoror the like and exert a retarding draft on the outer part 'of the bed frame, and power actuated driving devices for the said windingdrum rotating in a direction to wind up the re'- tarding cable, saiddevices comprising adjustable yieldable friction parts adapted when. tightened to cause rotation of the drum in the, direction 4to wind up the rev tarding cable and when loosened to permit rotation of, the drum in the opposite direction with various-degrees 'of frictional re-L 5'. In a ,mining machine of the class described, the combination ;of the bedfframe,

the cutting. apparatusica-i'ried thereby, means for movingv the frame andcutting apparatus; bodily, laterally, along the coal during operi',

ation, yielding means for adjustably retard-' ing the advance of the frame, and power actuated devices independent of the feeding@ t tolwindiup the retarding cable, and friction devices for causing the retarding devices to bodilymove the `frame backward while the cutting apparatus is in action.

6. 'In a mining machine |of the class 'described, the combination with the. bed frame,

the cutting apparatus carried thereby, said frame' andcutting apparatus adapted to be moved bodily, laterally, along. the vcoal dui'- ing operation, the retarding cable, the winding drum therefor, and the adjustable yield-v v ing devices for resisting thevrotation of the drum when the cable is unwinding, of the power actuated devices adapted'torotate the v drum in the cable-winding ldirection!)'While 4the cutter-vis bodily advancing, and'optionallyA controllable means vfor causing said,

vpower devices to rotate the drum in said direction.

'7. In a mining'v machine, the combination of a bed frame, cutting apparatusprojecting from the innerend of the bed frame, a winding druml mounted yni-,the bed frame,

a feed cable having one vend secured to said winding drum and adapted toexert a foro'f .thel coal, a second winding drum mounted on the bed frame, a retarding cable having 4ward dra-.ft o n the inner part yof l'the bed f frame 'to propel the machine along the face` one of its ends attached' to the last named t winding drumy and being adaptedfand arranged to 'extendi rearward from. thel mail@n 5f chine to ananchor or the like and exerteretarding draft onthe outer part of *the bed frame, a motor on thevb'ed frame, driving connections between the motor and 'the cutting apparatus, drivin'gconnectioi s comprising a disengageable clutch betwr;V` n `the motor and* the rst namedwindingdrum,

and driving connections between the'motor and the retarding cable drum rotating in a direction to wind v[u p the retardingcable,

said devices comprising adjustablel yield-V tightened able friction parts adapted whn :'11

to cause' rotation of the drum the ydirec'- tion to wind up the retarding cable andwhen loosened to permitrotation of the drum in the opposite direction :with various! degrees of frictional resistance,- the feed cable and itswinding drum being actuated independently of the'retarding cable drum.

8. In a mining machine, the combination I v of a bed frame, cutting vapparatus'projecting from the inner. end of the` bed frame, a power actuated cableA arranged to-exert a the bed frame, a winding drum. onthe bed' framefto which yone end .of the retarding 'cable is attached, power actuated driving devicesv for the said drum whichare disconnectible independently of the said draft" cable and arranged-'to rotatein a 4direction vforward draft on the 4inner part ofthe bed devices adapted to resiSt-the-rotation of the 'drum in the opposite direction when the said driving devices are 'not in effective operation.

9. In a mining machine, the combination of a bed frame, cutting apparatus projecting from the inner end of the bed frame, a

winding drum mounted on, the bed frame;

a feed cable having oneend connected to the winding drum vand* arranged to exert a forward draft on the inner part of the leedy frame tov propel the machine along the face of the coal, a' second winding drum mounted on the bed fram@A a ret-arding cable having one` .end secured to the winding drum andl being adapted to extend rearward from the machine to an anchor or the like -and exert a' I retarding draft on the outer part of the bed l miam? frame,v a motor on the bed frame, gearing i hetween the motor andthe first named windi'ng drum adapted to drive said drum at a relatively slow speed, and gearingbetween -the motorvand the retardi'ng cable drum adapted to fdrive the latter at a relatively In testimony whereof, I `aflix my signature, in presence-of two witnesses. Y

CARL 1E. wAxBoM.

Witnesses: l' A C. H. ANTHONY,

DUDLEY T. FISHER. 

